Aspirin hc9h7o4 or c9h8o4 cid 2244 structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities. Aspirin, also called acetylsalicylic acid, derivative of salicylic acid that is a mild nonnarcotic analgesic pain reliever useful in the relief of headache and muscle and joint aches. In the presence of moisture, aspirin may decompose hydrolysis into salicylic acid and acetic acid. Download as ppt, pdf, txt or read online from scribd. Acetylsalicylic acid by pharmetics inc acetylsalicylic acid asa belongs to the group of medications called analgesics pain relievers, antipyretics fever reducers, antiinflammatories inflammation reducers, and platelet aggregation inhibitors anticlotting agents. Determination of acetylsalicylic acid in aspirin using total. Pharmacokinetics and pharmacodynamics of acetylsalicylic acid. Acetylsalicylic acid is slightly soluble in water, with a limit of solubility reported as approximately 3 mgml at 25 deg c. Expt 80 synthesis of acetylsalicylic acid aspirin fromk.
Salicylic acid, whose name comes from salix, the willow family of plants, was derived from willow bark extracts. Aqueous solutions of acetylsalicylic acid are most stable at ph 2. An experiment is described that is suitable for the early portion of the laboratory in a general chemistry course and integrates organic examples. Specific inflammatory conditions which aspirin is used to treat include kawasaki disease, pericarditis, and rheumatic fever. It is also soluble in ethanol at 50 mgml and will dissolve in solutions of alkali hydroxides and carbonates with decomposition. Macroscale synthesis of acetylsalicylic acid 1alleyromae o. Aspirin and acetic acid are formed when the hydrogen in the phenolic alcohol group of salicylic acid is replaced by an acetyl h3ccoo group. Aspirin is effective in reducing fever, inflammation, and swelling and thus has been used for treatment of rheumatoid arthritis, rheumatic fever, and mild. Aspirin is a trade name for acetylsalicylic acid, a common analgesic. It is considered the prototype aspirin is sometimes used in the prevention of certain diseases, though its role as a preventive agent is controversial because of the risk of adverse effects. Pharmacokinetics and pharmacodynamics of acetylsalicylic acid after intravenous and oral administration to healthy volunteers j nagelschmitz,1 m blunck,1 j kraetzschmar,1 m ludwig,1 g wensing,1 t hohlfeld2 1bayer healthcare ag, clinical pharmacology, wuppertal, germany. Aspirin is an ester of salicylic acid which passes through the stomach unchanged before being hydrolysed by the basic medium of the intestine to form the active compound. Oacetylsalicylic acid 2acetoxybenzoic acid aspirin formula.
The reaction apparatus consists of a 100 ml twoneck flask with magnetic stir bar, temperature sensor and intensive cooler. In part i of this experiment, you will prepare aspirin by reaction of salicylic acid with acetic anhydride, using concentrated sulfuric acid as a catalyst. View the article pdf and any associated supplements and figures for a period of 48 hours. The name aspirin is derived from acetylated spiraeic acid the old name for salicylic acid. In the us, acetylsalicylic acid is a member of the following drug classes. Synthesis of salicylic acid from oil of wintergreen. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Since the stoichiometric molar ratio of salicylic acid to acetic anhydride is 1. Acetylsalicylic acid preparations specifically intended for use as antithrombotic agents are classified in this group. They may then use a quick confirmatory test to examine for the presence of salicylic acid, which can be used to synthesize acetylsalicylic acid. Aqueous solutions of acetylsalicylic acid are most stable at ph 2 3, but to assure full. Aspirin is also used longterm to help prevent further heart attacks, ischaemic strokes. Results for acetylsalicylic acid in 1% acetic acid chloroform solution standard conc mgl emission 1 0. It is one of the oldest and widely used drugs in medicine.
The clinical and research facilities of the central islip state hospital, central islip, n. Some of the dosage forms listed on this page may not apply to the brand name acetylsalicylic acid. Low doses of orally administered acetylsalicylic acid asa irreversibly inhibit platelet cyclooxygenase cox1, thereby preventing the enzymatic formation of thromboxane a 2, a potent activator of both platelet aggregation and vasoconstriction. Salicylic acid and its esters are used as food preservatives, in skincare products and other cosmetics, and in topical medicines. Determination of acetylsalicylic acid in aspirin using. To determine when the reaction is complete, students will use a small amount of the indicator.
Add 6 ml of acetic anhydride and 58 drops of 85% phosphoric acid to the flask. O acetylsalicylic acid is the prototypical analgesic used in the treatment of mild to moderate pain. Acetylsalicylic acid definition of acetylsalicylic acid. Synthesis and purification of acetylsalicylic acid asa or. He used powder extracted from the bark of willows to treat pain and reduce fever. Aspirin, also known as acetylsalicylic acid asa, is a medication used to reduce pain, fever, or inflammation. It is the twostep synthesis of aspirin starting from oil of wintergreen. Microscale synthesis of acetylsalicylic acid aspirin acetyl salicylic acid mw180. Inhibition of cox2dependent prostaglandins occurs at much higher oral asa doses than those used in cardiovascular prophylaxis. Aspirin given shortly after a heart attack decreases the risk of death.
Acetylsalicylic acid asa the synthesis of asa from salicylic acid results in the formation of an ester functional group and, therefore, is called an esterification. The products of the reaction between salicylic acid and acetic anhydride are acetylsalicylic acid and acetic acid3. If you will be calculating actual and theoretical yield, be sure to record how much salicylic acid you actually measured. The synthesis of aspirin from oil of wintergreen is an example of one of. Jan 30, 20 synthesis of aspirin acetylsalicylic acid using acid and base catalysis.
The experiment differs in three ways from traditional aspirin synthesis experiments for general chemistry. Your aspirin product as well as a commercial aspirin tablet will be compared to a standard 0. In this exercise, the goal was to produce acetylsalicylic acid through the organic synthesis from the reaction of salicylic acid to acetic anhydride, the starting materials. Unlimited viewing of the articlechapter pdf and any associated supplements and figures. Acetylsalicylic acid is an acetic acid ester derivative of salicylic acid. Jul 27, 2017 acetylsalicylic acid get uptodate information on acetylsalicylic acid side effects, uses, dosage, overdose, pregnancy, alcohol and more. The ferric chloride test and melting point were used to test the purity of the results. From the time of ancient greeks to the present, acetylsalicylic acid or its parent.
To understand the chemistry, the student must be able to recognize the common molecular framework shared by oil of wintergreen, salicylic acid, and aspirin and to identify the oh and co2 sites where chemical changes occur. One electron pair is represented by a single black dot. This is not surprising when one considers the medicinal applications for aspirin. Pdf preparing a pure aspirin acetylsalicylic acid researchgate. The phenol group on the salicylic acid forms an ester with the.
It can therefore undergo two different types of esterification reactions, creating an ester either with the hydroxyl or with the acid. Aspirin has been used as a medicine by the ancient greeks and the pharaohs of egypt. Asa product, salicylic acid, a crushed aspirin tablet, and pure asa from. Synthesis of acetylsalicylic acid aspirin using acid. Thus, salicylic acid is limiting and a maximum of 0. For this reason, it is industrially synthesized on a massive scale, producing up. Preparation of acetylsalicylic acid aspirin background one of the most widely used nonprescription drugs is aspirin. Synthesis of acetylsalicylic acid free essay example. Aspirin also inhibits platelet aggregation and is used in the prevention of arterial and venous thrombosis.
Instead of using acetic acid, acetic anhydride was used as solvent since the anhydride reacting with water to form acetic acid tends to drive the reaction to the right. The chemical name for aspirin is acetylsalicylic acid. An ester group is an important functional group that can be synthesized via a number of different way 1. Dec 11, 2011 synthesis and purification of acetylsalicylic acid asa or aspirin background salicylic acid is a phenol as well as a carboxylic acid. Acetylsalicylic acid side effects, uses, dosage, overdose. Acetylsalicylic acid is not very soluble in cold water 0. Acetylsalicylic acid aspirin, a prodrug to salicylic acid, is made by an entirely different process. O acetylsalicylic acid 2acetoxybenzoic acid aspirin formula.
After synthesis and analysis, it will be determined if the crude and recrystallized samples were composed solely of either salicylic acid, acetylsalicylic acid, or a combination of both 3. E29 preparation of aspirin acetylsalicylic acid and thin. Pdf this aim of this experiment focuses on the synthesis of pure aspirin acetylsalicylic acid from ethanoic anhydride and salicylic acid while. This aim of this experiment focuses on the synthesis of pure aspirin acetylsalicylic acid from ethanoic anhydride and salicylic acid while using concentrated sulfuric acid as a catalyst for the. A greener synthesis of acetylsalicylic acid wards science. Aspirin originally was derived by boiling the bark of the white willow tree. Results for acetylsalicylic acid in 1% acetic acidchloroform solution standard conc mgl emission 1 0. Acetylsalicylic acid definition of acetylsalicylic acid by. The paper deals with an alternative route for the synthesis of nacetylpaminophenol paracetamol, par and acetylsalicylic acid aspirin, asa using principles of green chemistry, namely solvent. The excess acetic anhydride is then decomposed with water to form acetic acid.
The merck index, which is an encyclopedia of chemicals, drugs and biologicals, lists the following information under aspirin. E29 esterification preparation of aspirin acetylsalicylic acid and thinlayer chromatography of analesic drugs salicin, a glycoside of salicylic acid present in the leaves and bark of willow trees, has been used for centuries in a variety of herbal remedies. Acetylsalicylic acid definition is a white crystalline derivative c9h8o4 of salicylic acid used for relief of pain and fever. The average tablet contains about 325 milligrams of the active ingredient acetylsalicylic acid combined with an inert binding material such as starch. Aspirin is the common name for the compound acetylsalicylic acid, widely used as a fever reducer and as a pain killer. In some countries, this medicine may only be approved for veterinary use. The first step in this esterification is to create a suspension of salicylic acid a solid at room temperature in an excess of acetic anhydride a liquid at room temperature. Williamson, macroscale and microscale organic experiments, 2nd ed. This document contains side effect information about aspirin.
Pdf alternative synthesis of paracetamol and aspirin. Synthesis of aspirin experiment chemistry libretexts. Experiment 11 synthesis and analysis of aspirin csun. Synthesis of acetylsalicylic acid aspirin acetic anhydride and salicylic acid react to produce acetylsalicylic acid and acetic acid. In this experiment, you will measure the melting point of your synthesized. Synthesis of acetylsalicylic acid occurs by protonation of carbonyl co group, and a nucleophilic attack of oh on the acetic anhydride.
In the united states, more than 15,000 pounds are sold each year. Balaguer 1department of physical sciences, college of science, polytechnic university of the philippines, sta. Jan 21, 2016 in this video the synthesis of acetylsalicylic acid is shown. In vivo, it is converted into salicylic acid which acts to reduce. Aspirin acetylsalicylic acid is a painrelieving compound familiar to virtually all students. Aspirin is used to relieve pain, reduce inflammation, and lower fever. Aspirin can be made by reacting salicylic acid with acetic acid in the presence of an acid catalyst. In folk medicine, willow bark teas were used as headache remedies and other tonics. It is used quite often as an introduction to preparative organic chemistry. A small amount of a strong acid is used as a catalyst which speeds up the reaction. Pharmacokinetics and pharmacodynamics of acetylsalicylic. Salicylic is a weak acid with an alcohol functional group attached to it.
Pdf alternative synthesis of paracetamol and aspirin under. It is effective in reducing pain it is an analgesic, reducing inflammation antiinflammatory, reducing fever antipyretic, and thinning blood anticoagulant. The mechanism for this synthesis provides examples of three major classes of chemical reactions. Acetylsalicylic acid, or aspirin, which is derived from salicylic acid, is the most widely used mild analgesic. Synthesis of acetylsalicylic acid dan jones, josh schmidt abstract acetylsalicylic acid, commonly known as aspirin, is considered to be the most successful pharmaceutical product in the world. Synthesis and purification of acetylsalicylic acid asa or aspirin background salicylic acid is a phenol as well as a carboxylic acid. Furthermore, the acetylsalicylic acid will be in a free state and travel further because the ester and acetyl functional groups no longer have hydrogen bonds that bond to the polar silica plate. E29 esterification preparation of aspirin acetylsalicylic. This product includes sodium hydroxide, hydrochloric acid, methyl salicylate, disposable and graduated pipettes, a teachers manual, and a student study guide with copymasters.
The reaction of carboxylic acid and alcohol with the presence of a catalyst such as. Aspirin, also known as acetylsalicylic acid, dates back to 1897, when it was isolated by felix hoffmann, a chemist with a german company bayer. This experiment was carried out to see how the hydroxyl group on the benzene ring in salicylic acid reacts with acetic anhydride to form an ester, and to make aspirin. In this video the synthesis of acetylsalicylic acid is shown. For this reason, it is industrially synthesized on a massive scale, producing up to 1800 kg 10,000 moles per batch. Safety data sheet northwest missouri state university. Curiously, salicylic acid is also a metabolite of aspirin.
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